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From: BartC <bc@freeuk.com>
Newsgroups: comp.lang.ada
Subject: Re: Best way to put an array-based pixmap on a screen?
Date: Sun, 26 Mar 2017 22:00:10 +0100
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Xref: news.eternal-september.org comp.lang.ada:46471
Date: 2017-03-26T22:00:10+01:00
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On 26/03/2017 09:25, Dmitry A. Kazakov wrote:
> On 2017-03-26 03:01, LaeMing Ai wrote:
>> I am hoping to learn some Ada with an explicit interest in simple
>> software 3D rendering (ie: writing the render code in Ada, NOT calling
>> external libraries such as OpenGL).

> Cairo rendering is more or less simple:
>
>    https://www.cairographics.org/tutorial

Ah! Perhaps a simpler way to get into Cairo, since I got bogged down 
last time (trying to use it via C). I click Download on your link, 
scroll to Windows, and it says I need to download GTK+ as it will have 
Cairo.

OK, GTK download page, Windows, it says I will need GLib, cairo, Pango, 
ATK, gdk-pixbuf and GTK+ developer packages.... Then it says it's best 
to install MSYS2 to download binaries (we are still trying to download a 
simple rendering package, right?).

This is obviously going to lead nowhere. Back a few pages, it suggests 
Glade, but, looking at it, it appears to have nothing to do with GTK. Or 
with Cairo (remember that?).

A very familiar pattern.

I would suggest to the OP, especially if having similar problems trying 
to install purportedly 'simple' packages, to just create an N by 2N 
array of pixels, and draw directly into it.

But to view the result, it will necessary to write it to a file in some 
recognised format (PPM is perhaps the simplest), and use some external 
utility to display. Perhaps the OS will already be able to show it.

-- 
Bartc